John flinn



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JOHN FLINN, OFPHlLA-DELPHIA, PENNSYLVANIA, SSIGNO'R TO'AROHER- A S'IEEL,)F THE SAME PLACE.

Letters Patent No. 72,008, dated December 10, 1867.

IMPROVED SELF-FAS-IENING SPRING FOB. WBBBING.

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T0 ALL WHOM IT MAY CONCEEN:

Be it known that I, JOHN FLINN, of the cityof Philadelphia., in theState of Pennsylvania, have invented a new and improved Self-FasteningSpring for Application to Webbing; and I do hereby declare that thefollowing is a full, clear, and exact description of the constructionand operation of the same, reference being had to the accompanyingdrawings, making a part of this specification, in which- Figure 1 is asectional plane view, and

Figure 2 a sectional elevation of the said improved spring, and

Figure 3 a plane view of the under side of the webbing, having one ofthe said springs applied thereto-7 Likeletters of reference indicatingthe same parts when in the different figures. i

The spiral wire springs hitherto used in making the spring-seats orbottoms of chairs, sofas, &c., require to be sewed fast to the webbing,and, consequently, are very liable to wear loose, become detached, andslipped out v of place, in ashort time, by use.

The object of my invention is to obviate this result, by making thesprings scltlfastening, o r capable of holding themselves properly anddurably in position when applied to the webbing.

It consists in so bending one end of the spiral coil oi' wire, in makingthe spring, that a spring-clamp will be formed thcreat, which will holdthe spring permanently in place, after it has been applied, by slippingit over the webbing, substantially as hereinafter described.

In the drawings, A A are the spring coils, and B C D E theclamping-coils. AThe wire from the clamping? coil B is extended outwardtherefrom, in a largerr curve', C,'toyabout'an inch, more or less, andthen, by a short turn at D, backward to the opposite side, andalittle-above'the said coil B, thence aroundthe same, by a cons. centric curve,to the first-mentioned side, and, finally, outward therefromtangentially to about an inch, more or less, where it is cut o, as shownby E, in iigs. 1 and 3. The circulnr part, C, of D and E, after thespring has been thus formed, remains sprung partly over and in contactwith the upper side of the coil B, producing together the saidspring-clamp. i

The spring thus constructed is applied to the webbing F (see tig. 3) byslipping the opening left between the coil C and the next coil above it,solas to bring the one edge of the said webbing F between them, and thenrotating the whole spring around, in the direction of the arrows, untilthe parts GD E are brought into the position shown in g. 3, on theunderside of the stretched webbing of the seat, and consequently thecircular coil B into the relative position on the opposite side of thewebbing, as indicated by the dotted lines in the same figure, thuselainpingthe webbing between them so as -to keep the springsecurelylantl permanently in place. The distance of the short bend Dfrom the circular coil B is intended to be made more or less,as thewidth of the particular webbing used may require, in' order that thecentre of thc coil B will come to the middle of the webbing to which itis to be applied, as shown in lig. 3. v

It will be seen that this selflfastening spring will permanently holditself in place on the webbing without thc aid of' any sewing whateverfor the purpose, and, moreover, that it .can be applied with muchgreater facility than the old spring.

What I claim as my invention, and desire to secure by Letters Patent, isconfined to the following, viz: 'l claim a spiral spring, icr webbing,having the wire at one end of the spiral coils A-A bent in the mannerdescribed and shown by B C D E, for the purpose specified.

JOHN FLINN.

Witnesses:

Bent. Monrsou, WM.4 H. Monson,

